Load Specifications
Load data in caliber 8.6 mm Blackout with .338 | 300gr | MAKER .338 ARC/Spectre Expanding Subsonic bullet and 76 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Alliant Power Pro 1200-R, SNPE Vectan SP 10 and Hodgdon H335.
Important Notice: DO NOT go below Minimum Charge or above Maximum Charge. Since we have no control over the equipment and components used, any responsibility and liability for the results achieved is rejected.
Only powders/loads that match the current filter criteria are displayed: max pressure of a load ≤ 90% of max. standardized pressure, fill rate ≥ 80% and propellant combustion ≥ 95%. Use the sliders above the tables to adjust these thresholds.
Charge: Powder weight in grains. Start with the minimum load and work up carefully.
FR (Fill Rate): Case fill as a percentage. Values above 100% mean compressed loads.
MaxP / %: Maximum chamber pressure in bar and as a percentage of the standardized maximum for this caliber.
V(0): Muzzle velocity in feet per second (fps) at the standardized barrel length.
z (Powder Burn): Estimated propellant combustion percentage at bullet exit.
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Max Load - Barrel Length: 16"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 1680 | <<locked>> | 86% | 55,869 psi | 89% | 1726 fps | 100% |
| Accurate 2015 | <<locked>> | 98% | 53,345 psi | 85% | 1762 fps | 100% |
| Accurate 2200 | <<locked>> | 90% | 56,188 psi | 89% | 1821 fps | 96.8% |
| Accurate 2230 | <<locked>> | 90% | 56,130 psi | 89% | 1827 fps | 97.2% |
| Accurate 2460 | <<locked>> | 96% | 55,709 psi | 88% | 1808 fps | 99.8% |
| Accurate 2495ᴾ | <<locked>> | 100% | 45,034 psi | 71% | 1729 fps | 100% |
| Accurate 2520ᴾ | <<locked>> | 100% | 56,072 psi | 89% | 1841 fps | 99.7% |
| Accurate 4064ᴾ | <<locked>> | 100% | 41,858 psi | 66% | 1713 fps | 98.9% |
| Accurate LT-30 | <<locked>> | 92% | 56,855 psi | 90% | 1742 fps | 100% |
| Accurate LT-32 | <<locked>> | 90% | 53,737 psi | 85% | 1716 fps | 99.5% |
| ADI AR 2206Hᴾ | <<locked>> | 100% | 52,634 psi | 83% | 1804 fps | 97.1% |
| ADI AR 2207 | <<locked>> | 90% | 56,942 psi | 90% | 1752 fps | 100% |
| ADI AR 2219 | <<locked>> | 92% | 55,622 psi | 88% | 1818 fps | 100% |
| ADI Benchmark 8208ᴾ | <<locked>> | 100% | 55,985 psi | 89% | 1814 fps | 98.6% |
| Alliant AR-Compᴾ | <<locked>> | 100% | 53,055 psi | 84% | 1811 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 96% | 56,913 psi | 90% | 1883 fps | 98.5% |
| Alliant Reloder- TS 15.5ᴾ | <<locked>> | 100% | 41,916 psi | 66% | 1703 fps | 95.8% |
| Alliant Reloder-10x | <<locked>> | 94% | 54,317 psi | 86% | 1775 fps | 100% |
| Alliant Reloder-7 | <<locked>> | 88% | 55,071 psi | 87% | 1736 fps | 100% |
| Baschieri & Pellagri 106 | <<locked>> | 92% | 54,795 psi | 87% | 1739 fps | 100% |
| Bofors RP3ᴾ | <<locked>> | 100% | 41,176 psi | 65% | 1706 fps | 95.7% |
| Hodgdon Benchmark | <<locked>> | 98% | 55,492 psi | 88% | 1778 fps | 99% |
| Hodgdon BL-C2ᴾ | <<locked>> | 100% | 53,287 psi | 84% | 1834 fps | 98.8% |
| Hodgdon CFE223 | <<locked>> | 98% | 55,796 psi | 88% | 1890 fps | 97% |
| Hodgdon H322 | <<locked>> | 96% | 56,666 psi | 90% | 1827 fps | 100% |
| Hodgdon H335 | <<locked>> | 94% | 54,389 psi | 86% | 1814 fps | 99.8% |
| Hodgdon H4198 | <<locked>> | 88% | 55,579 psi | 88% | 1739 fps | 100% |
| Hodgdon H4895ᴾ | <<locked>> | 100% | 52,881 psi | 84% | 1811 fps | 97.7% |
| Hodgdon LEVERevolutionᴾ | <<locked>> | 100% | 47,456 psi | 75% | 1788 fps | 97% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 32,924 psi | 52% | 1020 fps | 100% |
| Hodgdon VARGETᴾ | <<locked>> | 100% | 51,634 psi | 82% | 1781 fps | 97.3% |
| IMR 3031ᴾ | <<locked>> | 100% | 50,531 psi | 80% | 1811 fps | 100% |
| IMR 4198 | <<locked>> | 94% | 55,840 psi | 89% | 1752 fps | 100% |
| IMR 4227 | <<locked>> | 84% | 56,014 psi | 89% | 1699 fps | 100% |
| IMR 4895ᴾ | <<locked>> | 100% | 47,369 psi | 75% | 1775 fps | 96.1% |
| IMR 8208 XBRᴾ | <<locked>> | 100% | 55,985 psi | 89% | 1814 fps | 98.6% |
| Lovex D073.4 | <<locked>> | 90% | 56,869 psi | 90% | 1821 fps | 99.6% |
| Lovex D073.5 | <<locked>> | 96% | 55,695 psi | 88% | 1811 fps | 99.2% |
| Lovex D073.6ᴾ | <<locked>> | 100% | 50,009 psi | 79% | 1791 fps | 99.2% |
| Lovex S053 | <<locked>> | 84% | 54,607 psi | 87% | 1663 fps | 100% |
| Lovex S060ᴾ | <<locked>> | 100% | 54,389 psi | 86% | 1765 fps | 97.3% |
| Lovex S062ᴾ | <<locked>> | 100% | 45,484 psi | 72% | 1719 fps | 97.1% |
| Norma 200 | <<locked>> | 90% | 54,636 psi | 87% | 1762 fps | 100% |
| Norma 201ᴾ | <<locked>> | 100% | 51,401 psi | 81% | 1772 fps | 98.1% |
| Norma 202ᴾ | <<locked>> | 100% | 50,923 psi | 81% | 1778 fps | 99.6% |
| Ramshot Wild Boarᴾ | <<locked>> | 100% | 54,998 psi | 87% | 1834 fps | 97.3% |
| Ramshot X-Terminator | <<locked>> | 96% | 54,853 psi | 87% | 1788 fps | 97.1% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 33,315 psi | 53% | 1050 fps | 100% |
| ReloadSwiss RS 36 | <<locked>> | 84% | 55,651 psi | 88% | 1722 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 96% | 56,362 psi | 89% | 1814 fps | 99.5% |
| ReloadSwiss RS 60ᴾ | <<locked>> | 100% | 40,741 psi | 65% | 1726 fps | 96.5% |
| Rottweil R 901ᴾ | <<locked>> | 100% | 55,825 psi | 88% | 1801 fps | 99.8% |
| Rottweil R 902ᴾ | <<locked>> | 100% | 48,298 psi | 77% | 1732 fps | 97.6% |
| Shooters World AR Plus | <<locked>> | 90% | 56,869 psi | 90% | 1821 fps | 99.6% |
| Shooters World Match Rifleᴾ | <<locked>> | 100% | 50,009 psi | 79% | 1791 fps | 99.2% |
| Shooters World Precisionᴾ | <<locked>> | 100% | 45,484 psi | 72% | 1719 fps | 97.1% |
| Shooters World Tactical Rifle | <<locked>> | 92% | 53,563 psi | 85% | 1762 fps | 98% |
| SNPE Vectan BA6 1/2 | <<locked>> | 88% | 55,288 psi | 88% | 1565 fps | 100% |
| SNPE Vectan SP 10 | <<locked>> | 92% | 55,506 psi | 88% | 1818 fps | 99.8% |
| SNPE Vectan SP 3 | <<locked>> | 94% | 55,753 psi | 88% | 1788 fps | 100% |
| SNPE Vectan SP 9ᴾ | <<locked>> | 100% | 50,647 psi | 80% | 1781 fps | 96.6% |
| SNPE Vectan Tubal 3000ᴾ | <<locked>> | 100% | 54,810 psi | 87% | 1749 fps | 99.8% |
| SNPE Vectan Tubal 5000ᴾ | <<locked>> | 100% | 44,019 psi | 70% | 1654 fps | 99.4% |
| Somchem S321 | <<locked>> | 98% | 57,014 psi | 90% | 1844 fps | 99% |
| Somchem S335ᴾ | <<locked>> | 100% | 53,098 psi | 84% | 1752 fps | 99.9% |
| Somchem S341ᴾ | <<locked>> | 100% | 53,127 psi | 84% | 1798 fps | 96.8% |
| Vihtavuori N120 | <<locked>> | 90% | 56,971 psi | 90% | 1722 fps | 100% |
| Vihtavuori N130 | <<locked>> | 96% | 54,868 psi | 87% | 1742 fps | 100% |
| Vihtavuori N133ᴾ | <<locked>> | 100% | 53,969 psi | 86% | 1745 fps | 100% |
| Vihtavuori N135ᴾ | <<locked>> | 100% | 45,963 psi | 73% | 1729 fps | 100% |
| Vihtavuori N140ᴾ | <<locked>> | 100% | 48,254 psi | 76% | 1736 fps | 99.5% |
| Vihtavuori N150ᴾ | <<locked>> | 100% | 38,580 psi | 61% | 1634 fps | 95.7% |
| Vihtavuori N530ᴾ | <<locked>> | 100% | 56,579 psi | 90% | 1814 fps | 98.7% |
| Vihtavuori N540ᴾ | <<locked>> | 100% | 46,702 psi | 74% | 1736 fps | 99% |
| Winchester 748ᴾ | <<locked>> | 100% | 54,389 psi | 86% | 1847 fps | 99.1% |
| Winchester StaBALL Matchᴾ | <<locked>> | 100% | 49,734 psi | 79% | 1785 fps | 97% |
Recommended = one of the top powders for this cartridge and bullet combination.
Start Load - Barrel Length: 16"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 1680 | <<locked>> | 80% | 46,296 psi | 73% | 1634 fps | 100% |
| Accurate 2015 | <<locked>> | 80% | 30,850 psi | 49% | 1490 fps | 98.3% |
| Accurate 2200 | <<locked>> | 86% | 49,487 psi | 78% | 1749 fps | 95.5% |
| Accurate 2230 | <<locked>> | 84% | 45,600 psi | 72% | 1713 fps | 95% |
| Accurate 2460 | <<locked>> | 80% | 33,025 psi | 52% | 1542 fps | 96.1% |
| Accurate 2495 | <<locked>> | 80% | 23,453 psi | 37% | 1411 fps | 95.9% |
| Accurate 2520 | <<locked>> | 84% | 32,866 psi | 52% | 1568 fps | 95.5% |
| Accurate 4064 | <<locked>> | 88% | 28,790 psi | 46% | 1519 fps | 95.4% |
| Accurate LT-30 | <<locked>> | 80% | 39,653 psi | 63% | 1558 fps | 99% |
| Accurate LT-32 | <<locked>> | 80% | 40,045 psi | 63% | 1562 fps | 97.5% |
| ADI AR 2206H | <<locked>> | 94% | 43,613 psi | 69% | 1699 fps | 95.1% |
| ADI AR 2207 | <<locked>> | 80% | 42,424 psi | 67% | 1614 fps | 100% |
| ADI AR 2219 | <<locked>> | 80% | 37,130 psi | 59% | 1608 fps | 98.4% |
| ADI Benchmark 8208 | <<locked>> | 88% | 38,812 psi | 62% | 1617 fps | 95.2% |
| Alliant AR-Comp | <<locked>> | 80% | 28,282 psi | 45% | 1503 fps | 99.5% |
| Alliant Power Pro 1200-R | 27.9 gr | 86% | 41,162 psi | 65% | 1699 fps | 95.4% |
| Alliant Reloder- TS 15.5 | <<locked>> | 98% | 39,610 psi | 63% | 1673 fps | 95.1% |
| Alliant Reloder-10x | <<locked>> | 80% | 35,650 psi | 57% | 1565 fps | 99.8% |
| Alliant Reloder-7 | <<locked>> | 80% | 43,381 psi | 69% | 1621 fps | 100% |
| Baschieri & Pellagri 106 | <<locked>> | 80% | 37,956 psi | 60% | 1558 fps | 98.9% |
| Bofors RP3 | <<locked>> | 98% | 38,754 psi | 61% | 1673 fps | 95% |
| Hodgdon Benchmark | <<locked>> | 84% | 37,014 psi | 59% | 1562 fps | 95.4% |
| Hodgdon BL-C2 | <<locked>> | 90% | 37,985 psi | 60% | 1654 fps | 95.8% |
| Hodgdon CFE223 | <<locked>> | 94% | 48,892 psi | 77% | 1814 fps | 95.5% |
| Hodgdon H322 | <<locked>> | 80% | 34,316 psi | 54% | 1568 fps | 97.7% |
| Hodgdon H335 | 27.8 gr | 80% | 34,432 psi | 55% | 1575 fps | 96.7% |
| Hodgdon H4198 | <<locked>> | 80% | 43,743 psi | 69% | 1614 fps | 99.2% |
| Hodgdon H4895 | <<locked>> | 92% | 41,365 psi | 66% | 1677 fps | 95.2% |
| Hodgdon LEVERevolution | <<locked>> | 96% | 42,032 psi | 67% | 1719 fps | 95.6% |
| Hodgdon TrailBoss | <<locked>> | 80% | 24,642 psi | 39% | 912 fps | 100% |
| Hodgdon VARGET | <<locked>> | 94% | 42,772 psi | 68% | 1680 fps | 95.3% |
| IMR 3031 | <<locked>> | 80% | 27,151 psi | 43% | 1483 fps | 96% |
| IMR 4198 | <<locked>> | 80% | 37,289 psi | 59% | 1555 fps | 100% |
| IMR 4227 | <<locked>> | 80% | 49,705 psi | 79% | 1644 fps | 100% |
| IMR 4895 | <<locked>> | 98% | 44,295 psi | 70% | 1736 fps | 95.4% |
| IMR 8208 XBR | <<locked>> | 88% | 38,812 psi | 62% | 1617 fps | 95.2% |
| Lovex D073.4 | <<locked>> | 80% | 40,219 psi | 64% | 1640 fps | 97.4% |
| Lovex D073.5 | <<locked>> | 82% | 35,056 psi | 56% | 1572 fps | 95.2% |
| Lovex D073.6 | <<locked>> | 88% | 33,228 psi | 53% | 1585 fps | 95.6% |
| Lovex S053 | <<locked>> | 80% | 48,646 psi | 77% | 1611 fps | 100% |
| Lovex S060 | <<locked>> | 94% | 45,614 psi | 72% | 1670 fps | 95.5% |
| Lovex S062 | <<locked>> | 94% | 37,942 psi | 60% | 1624 fps | 95.1% |
| Norma 200 | <<locked>> | 80% | 40,234 psi | 64% | 1611 fps | 100% |
| Norma 201 | <<locked>> | 90% | 37,855 psi | 60% | 1608 fps | 95.1% |
| Norma 202 | <<locked>> | 84% | 31,111 psi | 49% | 1522 fps | 95.7% |
| Ramshot Wild Boar | <<locked>> | 94% | 45,165 psi | 72% | 1726 fps | 95.3% |
| Ramshot X-Terminator | <<locked>> | 90% | 45,324 psi | 72% | 1686 fps | 95.1% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 24,395 psi | 39% | 932 fps | 100% |
| ReloadSwiss RS 36 | <<locked>> | 80% | 49,603 psi | 79% | 1670 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 80% | 34,026 psi | 54% | 1549 fps | 95.4% |
| ReloadSwiss RS 60 | <<locked>> | 98% | 38,174 psi | 61% | 1686 fps | 95.5% |
| Rottweil R 901 | <<locked>> | 80% | 31,270 psi | 50% | 1493 fps | 95.4% |
| Rottweil R 902 | <<locked>> | 92% | 38,072 psi | 60% | 1608 fps | 95.1% |
| Shooters World AR Plus | <<locked>> | 80% | 40,219 psi | 64% | 1640 fps | 97.4% |
| Shooters World Match Rifle | <<locked>> | 88% | 33,228 psi | 53% | 1585 fps | 95.6% |
| Shooters World Precision | <<locked>> | 94% | 37,942 psi | 60% | 1624 fps | 95.1% |
| Shooters World Tactical Rifle | <<locked>> | 84% | 41,249 psi | 65% | 1624 fps | 95.4% |
| SNPE Vectan BA6 1/2 | <<locked>> | 80% | 44,744 psi | 71% | 1473 fps | 100% |
| SNPE Vectan SP 10 | 27.8 gr | 80% | 37,826 psi | 60% | 1617 fps | 97.6% |
| SNPE Vectan SP 3 | <<locked>> | 80% | 36,376 psi | 58% | 1572 fps | 98.9% |
| SNPE Vectan SP 9 | <<locked>> | 96% | 44,846 psi | 71% | 1716 fps | 95.2% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 30,066 psi | 48% | 1447 fps | 95.1% |
| SNPE Vectan Tubal 5000 | <<locked>> | 84% | 27,354 psi | 43% | 1417 fps | 95.1% |
| Somchem S321 | <<locked>> | 86% | 38,667 psi | 61% | 1637 fps | 95.6% |
| Somchem S335 | <<locked>> | 80% | 29,196 psi | 46% | 1447 fps | 95.8% |
| Somchem S341 | <<locked>> | 96% | 46,499 psi | 74% | 1726 fps | 95.4% |
| Vihtavuori N120 | <<locked>> | 80% | 42,511 psi | 67% | 1588 fps | 100% |
| Vihtavuori N130 | <<locked>> | 80% | 34,287 psi | 54% | 1512 fps | 99.5% |
| Vihtavuori N133 | <<locked>> | 80% | 29,849 psi | 47% | 1457 fps | 97.9% |
| Vihtavuori N135 | <<locked>> | 80% | 24,976 psi | 40% | 1424 fps | 96.3% |
| Vihtavuori N140 | <<locked>> | 84% | 29,646 psi | 47% | 1486 fps | 95.4% |
| Vihtavuori N150 | <<locked>> | 98% | 36,390 psi | 58% | 1604 fps | 95% |
| Vihtavuori N530 | <<locked>> | 88% | 38,638 psi | 61% | 1614 fps | 95.2% |
| Vihtavuori N540 | <<locked>> | 88% | 32,039 psi | 51% | 1539 fps | 95.6% |
| Winchester 748 | <<locked>> | 88% | 36,883 psi | 58% | 1634 fps | 95.6% |
| Winchester StaBALL Match | <<locked>> | 96% | 43,976 psi | 70% | 1719 fps | 95.7% |
Recommended = one of the top powders for this cartridge and bullet combination.
ᴾ possible press load - work up slowly to this load while watching for signs of excessive pressure.
This overview compares 76 powders for 8.6 mm Blackout loaded with the .338 | 300gr | MAKER .338 ARC/Spectre Expanding Subsonic. Hodgdon CFE223 delivers the highest muzzle velocity at 1,890 fps; across all powders the maximum-charge window runs from 1,020 fps to 1,890 fps. Accurate 2495 gives the best case fill at 100 %, and 76 of the 76 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (427 MPa), the top charges use 52–90 %, leaving at least 10 % headroom. The 300.0 gr projectile in 0.338" calls for a 1:11.5 twist; slower twists will usually not stabilise this weight. Accurate 2495, Accurate 2520, Accurate 4064 reach 100 % fill or more at maximum charge, so these are compressed loads: they need a long drop tube to seat cleanly and react sensitively to the case capacity of your own brass lot. Alliant Power Pro 1200-R, SNPE Vectan SP 10, Hodgdon H335 rank at the top here: for 8.6 mm Blackout with the .338 | 300gr | MAKER .338 ARC/Spectre Expanding Subsonic they combine a high case fill with complete burn and sit in the upper velocity band. Hodgdon TrailBoss, ReloadSwiss RS 14 stay subsonic at start load. Always begin at the start load and work up in small increments while checking case and primer for pressure signs.